arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.32 2004-08-01 13:01:39 schaffner Exp $ */
   2 /*
   3  *
   4  * OGL video functions. - Added 9/15/99 Matthew Mueller
   5  *
   6  *
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <conf.h>
  11 #endif
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #ifdef _MSC_VER
  17 #include <windows.h>
  18 #endif
  19
  20 #if !defined(_MSC_VER) && !defined(macintosh)
  21 #include <unistd.h>
  22 #endif
  23 #if !defined(macintosh)
  24 #include <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <fcntl.h>
  27 #endif
  28
  29 #include <errno.h>
  30
  31 #include "hudmsg.h"
  32 #include "game.h"
  33 #include "text.h"
  34 #include "gr.h"
  35 #include "gamefont.h"
  36 #include "grdef.h"
  37 #include "palette.h"
  38 #include "u_mem.h"
  39 #include "error.h"
  40
  41 #include "inferno.h"
  42 #include "screens.h"
  43
  44 #include "strutil.h"
  45 #include "mono.h"
  46 #include "args.h"
  47 #include "key.h"
  48
  49 #define DECLARE_VARS
  50 #include "internal.h"
  51 #if defined(__APPLE__) && defined(__MACH__)
  52 #include <OpenGL/glu.h>
  53 #undef GL_ARB_multitexture // hack!
  54 #else
  55 #include <GL/glu.h>
  56 #endif
  57
  58 int ogl_voodoohack=0;
  59
  60 int gr_installed = 0;
  61
  62
  63 void gr_palette_clear(); // Function prototype for gr_init;
  64 int gl_initialized=0;
  65 int gl_reticle = 0;
  66
  67 int ogl_fullscreen=0;
  68
  69 int gr_check_fullscreen(void){
  70         return ogl_fullscreen;
  71 }
  72
  73 void gr_do_fullscreen(int f){
  74         if (ogl_voodoohack)
  75                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  76         else
  77                 ogl_fullscreen=f;
  78         if (gl_initialized){
  79                 ogl_do_fullscreen_internal();
  80         }
  81 }
  82
  83 int gr_toggle_fullscreen(void){
  84         gr_do_fullscreen(!ogl_fullscreen);
  85         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  86         return ogl_fullscreen;
  87 }
  88
  89 int arch_toggle_fullscreen_menu(void){
  90         unsigned char *buf=NULL;
  91
  92         if (ogl_readpixels_ok){
  93                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  94                 glReadBuffer(GL_FRONT);
  95                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  96         }
  97
  98         gr_do_fullscreen(!ogl_fullscreen);
  99
 100         if (ogl_readpixels_ok){
 101 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 102                 glRasterPos2f(0,0);
 103                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 104                 free(buf);
 105         }
 106         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 107
 108         return ogl_fullscreen;
 109 }
 110
 111 void ogl_init_state(void){
 112         /* select clearing (background) color   */
 113         glClearColor(0.0, 0.0, 0.0, 0.0);
 114         glShadeModel(GL_SMOOTH);
 115
 116         /* initialize viewing values */
 117         glMatrixMode(GL_PROJECTION);
 118         glLoadIdentity();
 119         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 120         glScalef(1.0, -1.0, 1.0);
 121         glTranslatef(0.0, -1.0, 0.0);
 122         gr_palette_step_up(0,0,0);//in case its left over from in game
 123 }
 124
 125 int last_screen_mode=-1;
 126
 127 void ogl_set_screen_mode(void){
 128         if (last_screen_mode==Screen_mode)
 129                 return;
 130         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 131 //      OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,grd_curcanv->cv_bitmap.bm_w,grd_curcanv->cv_bitmap.bm_h);
 132         if (Screen_mode==SCREEN_GAME){
 133                 glDrawBuffer(GL_BACK);
 134         }else{
 135                 glClearColor(0.0, 0.0, 0.0, 0.0);
 136                 glDrawBuffer(GL_FRONT);
 137                 glClear(GL_COLOR_BUFFER_BIT);
 138                 glMatrixMode(GL_PROJECTION);
 139                 glLoadIdentity();//clear matrix
 140                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 141                 glMatrixMode(GL_MODELVIEW);
 142                 glLoadIdentity();//clear matrix
 143                 glEnable(GL_BLEND);
 144                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 145         }
 146         last_screen_mode=Screen_mode;
 147 }
 148
 149 void gr_update()
 150 {
 151         if (gl_initialized){
 152
 153                 if(Screen_mode != SCREEN_GAME){
 154                         glFlush();
 155                 }
 156         }
 157 }
 158
 159 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 160
 161 void ogl_get_verinfo(void)
 162 {
 163         int t, arb_max_textures = -1, sgi_max_textures = -1;
 164 #ifdef GL_NV_register_combiners
 165         int nv_register_combiners = -1;
 166 #endif
 167         float anisotropic_max = 0;
 168
 169         gl_vendor=glGetString(GL_VENDOR);
 170         gl_renderer=glGetString(GL_RENDERER);
 171         gl_version=glGetString(GL_VERSION);
 172         gl_extensions=glGetString(GL_EXTENSIONS);
 173
 174         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 175
 176         ogl_intensity4_ok = 1;
 177         ogl_luminance4_alpha4_ok = 1;
 178         ogl_rgba2_ok = 1;
 179         ogl_gettexlevelparam_ok = 1;
 180         ogl_setgammaramp_ok = 1;
 181
 182 #ifdef WGL_VIDEO
 183         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 184         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 185         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 186         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 187         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 188         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 189         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 190         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 191         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 192 #endif
 193
 194 #ifdef GL_ARB_multitexture
 195         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 196         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 197 #endif
 198 #ifdef GL_SGIS_multitexture
 199         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 200         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 201 #endif
 202         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 203 #ifdef GL_NV_register_combiners
 204         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 205 #endif
 206
 207         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 208         if (ogl_ext_texture_filter_anisotropic_ok)
 209                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 210
 211 #ifdef GL_EXT_paletted_texture
 212         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 213         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 214 #endif
 215         //add driver specific hacks here.  whee.
 216         if ((stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.0\n")==0 || stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.2\n")==0) && stricmp(gl_version,"1.2 Mesa 3.0")==0){
 217                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 218                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 219                 ogl_gettexlevelparam_ok=0;//returns random data..
 220         }
 221         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 222                 //displays garbage. reported by
 223                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 224                 //  orulz (Matrox G200)
 225                 ogl_intensity4_ok=0;
 226         }
 227
 228         //allow overriding of stuff.
 229 #ifdef GL_ARB_multitexture
 230         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 231                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 232         }
 233         if (ogl_arb_multitexture_ok)
 234                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 235 #endif
 236 #ifdef GL_SGIS_multitexture
 237         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 238                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 239         }
 240         if (ogl_sgis_multitexture_ok)
 241                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 242 #endif
 243 #ifdef GL_NV_register_combiners
 244         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 245         {
 246                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 247         }
 248         if (ogl_nv_register_combiners_ok)
 249                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 250 #endif
 251 #ifdef GL_EXT_paletted_texture
 252         if ((t = FindArg("-gl_paletted_texture_ok")))
 253         {
 254                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 255         }
 256         if ((t = FindArg("-gl_shared_palette_ok")))
 257         {
 258                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 259         }
 260         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 261         printf("gl_paletted_texture: %i  gl_shared_palette: %i  (using paletted textures: %i)\n", ogl_paletted_texture_ok, ogl_shared_palette_ok, ogl_shared_palette_ok);
 262 #endif
 263         if ((t=FindArg("-gl_intensity4_ok"))){
 264                 ogl_intensity4_ok=atoi(Args[t+1]);
 265         }
 266         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 267                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 268         }
 269         if ((t=FindArg("-gl_rgba2_ok"))){
 270                 ogl_rgba2_ok=atoi(Args[t+1]);
 271         }
 272         if ((t=FindArg("-gl_readpixels_ok"))){
 273                 ogl_readpixels_ok=atoi(Args[t+1]);
 274         }
 275         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 276                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 277         }
 278         if ((t=FindArg("-gl_setgammaramp_ok")))
 279         {
 280                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 281         }
 282
 283         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i(%i units) gl_sgis_multitexture:%i(%i units) gl_nv_texture_env_combine4:%i\n", ogl_arb_multitexture_ok, arb_max_textures, ogl_sgis_multitexture_ok, sgi_max_textures, ogl_nv_texture_env_combine4_ok);
 284 #ifdef GL_NV_register_combiners
 285         con_printf(CON_VERBOSE, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 286 #endif
 287         con_printf(CON_VERBOSE, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i gl_setgammaramp_ok:%i gl_ext_texture_filter_anisotropic:%i(%f max)\n", ogl_intensity4_ok, ogl_luminance4_alpha4_ok, ogl_rgba2_ok, ogl_readpixels_ok, ogl_gettexlevelparam_ok, ogl_setgammaramp_ok, ogl_ext_texture_filter_anisotropic_ok, anisotropic_max);
 288 }
 289
 290
 291 int gr_check_mode(u_int32_t mode)
 292 {
 293         int w, h;
 294
 295         w = SM_W(mode);
 296         h = SM_H(mode);
 297         return ogl_check_mode(w, h); // platform specific code
 298 }
 299
 300
 301 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 302
 303 int gr_set_mode(u_int32_t mode)
 304 {
 305         unsigned int w,h;
 306         char *gr_bm_data;
 307
 308 #ifdef NOGRAPH
 309 return 0;
 310 #endif
 311 //      mode=0;
 312         if (mode<=0)
 313                 return 0;
 314
 315         w=SM_W(mode);
 316         h=SM_H(mode);
 317         VGA_current_mode = mode;
 318
 319         //if (screen != NULL) gr_palette_clear();
 320
 321 //      ogl_init_state();
 322
 323         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 324         memset( grd_curscreen, 0, sizeof(grs_screen));
 325         grd_curscreen->sc_mode = mode;
 326         grd_curscreen->sc_w = w;
 327         grd_curscreen->sc_h = h;
 328         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 329         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 330         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 331         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 332         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 333         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 334         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 335         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 336         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 337 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 338         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 339         gr_set_current_canvas(NULL);
 340         //gr_enable_default_palette_loading();
 341
 342         ogl_init_window(w,h);//platform specific code
 343
 344         ogl_get_verinfo();
 345
 346         OGL_VIEWPORT(0,0,w,h);
 347
 348         ogl_set_screen_mode();
 349
 350 //      gamefont_choose_game_font(w,h);
 351
 352         return 0;
 353 }
 354
 355 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 356 int ogl_atotexfilti(char *a,int min){
 357         GLstrcmptestr(a,NEAREST);
 358         GLstrcmptestr(a,LINEAR);
 359         if (min){//mipmaps are valid only for the min filter
 360                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 361                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 362                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 363                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 364         }
 365         Error("unknown/invalid texture filter %s\n",a);
 366 //      return GL_NEAREST;
 367 }
 368 int ogl_testneedmipmaps(int i){
 369         switch (i){
 370                 case GL_NEAREST:
 371                 case GL_LINEAR:
 372                         return 0;
 373                 case GL_NEAREST_MIPMAP_NEAREST:
 374                 case GL_NEAREST_MIPMAP_LINEAR:
 375                 case GL_LINEAR_MIPMAP_NEAREST:
 376                 case GL_LINEAR_MIPMAP_LINEAR:
 377                         return 1;
 378         }
 379         Error("unknown texture filter %x\n",i);
 380 //      return -1;
 381 }
 382 #ifdef OGL_RUNTIME_LOAD
 383 #ifdef _WIN32
 384 char *OglLibPath="opengl32.dll";
 385 #endif
 386 #ifdef __unix__
 387 char *OglLibPath="libGL.so";
 388 #endif
 389
 390 int ogl_rt_loaded=0;
 391 int ogl_init_load_library(void)
 392 {
 393         int retcode=0;
 394         if (!ogl_rt_loaded){
 395                 int t;
 396                 if ((t=FindArg("-gl_library")))
 397                         OglLibPath=Args[t+1];
 398
 399                 retcode = OpenGL_LoadLibrary(true);
 400                 if(retcode)
 401                 {
 402                         mprintf((0,"Opengl loaded ok\n"));
 403
 404                         if(!glEnd)
 405                         {
 406                                 Error("Opengl: Functions not imported\n");
 407                         }
 408                 }else{
 409                         Error("Opengl: error loading %s\n",OglLibPath);
 410                 }
 411                 ogl_rt_loaded=1;
 412         }
 413         return retcode;
 414 }
 415 #endif
 416
 417 int gr_init()
 418 {
 419         int mode = SM(640,480);
 420         int retcode, t, glt = 0;
 421
 422         // Only do this function once!
 423         if (gr_installed==1)
 424                 return -1;
 425
 426
 427 #ifdef OGL_RUNTIME_LOAD
 428         ogl_init_load_library();
 429 #endif
 430
 431 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 432         if (FindArg("-gl_voodoo")){
 433                 ogl_voodoohack=1;
 434                 gr_toggle_fullscreen();
 435         }
 436         if (FindArg("-fullscreen"))
 437                 gr_toggle_fullscreen();
 438 #endif
 439         if ((glt=FindArg("-gl_alttexmerge")))
 440                 ogl_alttexmerge=1;
 441         if ((t=FindArg("-gl_stdtexmerge")))
 442                 if (t>=glt)//allow overriding of earlier args
 443                         ogl_alttexmerge=0;
 444
 445         if ((glt = FindArg("-gl_16bittextures")))
 446         {
 447                 ogl_rgba_internalformat = GL_RGB5_A1;
 448                 ogl_rgb_internalformat = GL_RGB5;
 449         }
 450
 451         if ((glt=FindArg("-gl_mipmap"))){
 452                 GL_texmagfilt=GL_LINEAR;
 453                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 454         }
 455         if ((glt=FindArg("-gl_trilinear")))
 456         {
 457                 GL_texmagfilt = GL_LINEAR;
 458                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 459         }
 460         if ((t=FindArg("-gl_simple"))){
 461                 if (t>=glt){//allow overriding of earlier args
 462                         glt=t;
 463                         GL_texmagfilt=GL_NEAREST;
 464                         GL_texminfilt=GL_NEAREST;
 465                 }
 466         }
 467         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 468                 if (t>=glt)//allow overriding of earlier args
 469                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 470         }
 471         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 472                 if (t>=glt)//allow overriding of earlier args
 473                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 474         }
 475         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 476
 477         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 478         {
 479                 GL_texanisofilt=atof(Args[t + 1]);
 480         }
 481
 482         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 483
 484
 485         if ((t=FindArg("-gl_vidmem"))){
 486                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 487         }
 488         if ((t=FindArg("-gl_reticle"))){
 489                 gl_reticle=atoi(Args[t+1]);
 490         }
 491         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 492
 493         ogl_init();//platform specific initialization
 494
 495         ogl_init_texture_list_internal();
 496
 497         MALLOC( grd_curscreen,grs_screen,1 );
 498         memset( grd_curscreen, 0, sizeof(grs_screen));
 499         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 500
 501         // Set the mode.
 502         if ((retcode=gr_set_mode(mode)))
 503         {
 504                 return retcode;
 505         }
 506
 507         grd_curscreen->sc_canvas.cv_color = 0;
 508         grd_curscreen->sc_canvas.cv_drawmode = 0;
 509         grd_curscreen->sc_canvas.cv_font = NULL;
 510         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 511         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 512         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 513
 514         gr_installed = 1;
 515
 516         atexit(gr_close);
 517
 518         return 0;
 519 }
 520
 521 void gr_close()
 522 {
 523 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 524
 525         ogl_close();//platform specific code
 526         if (grd_curscreen){
 527                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 528                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 529                 d_free(grd_curscreen);
 530         }
 531 #ifdef OGL_RUNTIME_LOAD
 532         if (ogl_rt_loaded)
 533                 OpenGL_LoadLibrary(false);
 534 #endif
 535 }
 536 extern int r_upixelc;
 537 void ogl_upixelc(int x, int y, int c){
 538         r_upixelc++;
 539 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 540 //      if(Function_mode != FMODE_GAME){
 541 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 542 //      }else{
 543                 OGL_DISABLE(TEXTURE_2D);
 544                 glPointSize(1.0);
 545                 glBegin(GL_POINTS);
 546 //              glBegin(GL_LINES);
 547 //      ogl_pal=gr_current_pal;
 548                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 549 //      ogl_pal=gr_palette;
 550                 glVertex2f((x + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width, 1.0 - (y + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height);
 551 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 552                 glEnd();
 553 //      }
 554 }
 555 void ogl_urect(int left,int top,int right,int bot){
 556         GLfloat xo,yo,xf,yf;
 557         int c=COLOR;
 558
 559         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 560         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 561         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 562         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 563
 564         OGL_DISABLE(TEXTURE_2D);
 565         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 566         glBegin(GL_QUADS);
 567         glVertex2f(xo,yo);
 568         glVertex2f(xo,yf);
 569         glVertex2f(xf,yf);
 570         glVertex2f(xf,yo);
 571         glEnd();
 572 }
 573 void ogl_ulinec(int left,int top,int right,int bot,int c){
 574         GLfloat xo,yo,xf,yf;
 575
 576         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 577         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 578         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 579         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 580
 581         OGL_DISABLE(TEXTURE_2D);
 582         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 583         glBegin(GL_LINES);
 584         glVertex2f(xo,yo);
 585         glVertex2f(xf,yf);
 586         glEnd();
 587 }
 588
 589
 590 GLfloat last_r=0, last_g=0, last_b=0;
 591 int do_pal_step=0;
 592 void ogl_do_palfx(void){
 593 //      GLfloat r,g,b,a;
 594         OGL_DISABLE(TEXTURE_2D);
 595         if (gr_palette_faded_out){
 596 /*              glEnable(GL_BLEND);
 597                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 598                 glColor3f(0,0,0);
 599 //              r=g=b=0.0;a=1.0;
 600         }else{
 601                 if (do_pal_step){
 602                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 603                         glEnable(GL_BLEND);
 604                         glBlendFunc(GL_ONE,GL_ONE);
 605                         glColor3f(last_r,last_g,last_b);
 606 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 607                 }else
 608                         return;
 609         }
 610
 611
 612         glBegin(GL_QUADS);
 613         glVertex2f(0,0);
 614         glVertex2f(0,1);
 615         glVertex2f(1,1);
 616         glVertex2f(1,0);
 617         glEnd();
 618
 619         glEnable(GL_BLEND);
 620         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 621 }
 622
 623 void gr_palette_clear()
 624 {
 625         gr_palette_faded_out=1;
 626 }
 627
 628
 629 int ogl_brightness_ok = 0;
 630 int ogl_setgammaramp_ok = 1;
 631 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 632 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 633
 634 void gr_palette_step_up(int r, int g, int b)
 635 {
 636         if (gr_palette_faded_out)
 637                 return;
 638
 639         old_b_r = ogl_brightness_r;
 640         old_b_g = ogl_brightness_g;
 641         old_b_b = ogl_brightness_b;
 642
 643         ogl_brightness_r = max(r + gr_palette_gamma, 0);
 644         ogl_brightness_g = max(g + gr_palette_gamma, 0);
 645         ogl_brightness_b = max(b + gr_palette_gamma, 0);
 646
 647         if (ogl_setgammaramp_ok &&
 648             (old_b_r != ogl_brightness_r ||
 649              old_b_g != ogl_brightness_g ||
 650              old_b_b != ogl_brightness_b))
 651                 ogl_brightness_ok = !ogl_setbrightness_internal();
 652
 653         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 654         {
 655                 last_r = ogl_brightness_r / 63.0;
 656                 last_g = ogl_brightness_g / 63.0;
 657                 last_b = ogl_brightness_b / 63.0;
 658
 659                 do_pal_step = (r || g || b || gr_palette_gamma);
 660         }
 661         else
 662         {
 663                 do_pal_step = 0;
 664         }
 665 }
 666
 667 //added on 980913 by adb to fix palette problems
 668 // need a min without side effects...
 669 #undef min
 670 static inline int min(int x, int y) { return x < y ? x : y; }
 671 //end changes by adb
 672
 673 void gr_palette_load( ubyte *pal )
 674 {
 675  int i;//, j;
 676
 677  for (i=0; i<768; i++ ) {
 678      gr_current_pal[i] = pal[i];
 679      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 680  }
 681  //palette = screen->format->palette;
 682
 683  gr_palette_faded_out=0;
 684
 685         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 686
 687  init_computed_colors();
 688
 689         ogl_init_shared_palette();
 690 }
 691
 692
 693
 694 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 695 {
 696         gr_palette_faded_out=1;
 697         return 0;
 698 }
 699
 700
 701
 702 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 703 {
 704         gr_palette_faded_out=0;
 705         return 0;
 706 }
 707
 708
 709
 710 void gr_palette_read(ubyte * pal)
 711 {
 712         int i;
 713         for (i=0; i<768; i++ ) {
 714                 pal[i]=gr_current_pal[i];
 715                 if (pal[i] > 63) pal[i] = 63;
 716         }
 717 }
 718
 719 //writes out an uncompressed RGB .tga file
 720 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 721 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 722         int f;
 723 #ifdef _WIN32
 724         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
 725 #else
 726         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 727 #endif
 728         if (f>=0){
 729                 GLubyte    targaMagic[12] = { 0, //no identification field
 730                          0,//no colormap
 731                          2,//RGB image (well, BGR, actually)
 732                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 733                 GLubyte blah;
 734                 int r;
 735                 GLubyte *s;
 736                 int x,y;
 737
 738                 //write .TGA header.
 739                 write (f,targaMagic,sizeof(targaMagic));
 740                 blah=w%256;write (f,&blah,1);//w, low
 741                 blah=w/256;write (f,&blah,1);//w, high
 742                 blah=h%256;write (f,&blah,1);//h, low
 743                 blah=h/256;write (f,&blah,1);//h, high
 744                 blah=24;write (f,&blah,1);//24 bpp
 745                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 746
 747                 s=buf;
 748                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 749                         for (x=0;x<w;x++){
 750                                 blah=s[0];
 751                                 s[0]=s[2];
 752                                 s[2]=blah;
 753                                 s+=3;
 754                         }
 755                 }
 756                 x=0;y=w*h*3;
 757                 while (y > 0)
 758                 {
 759                         r=write(f,buf+x,y);
 760                         if (r<=0){
 761                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 762                                 break;
 763                         }
 764                         x+=r;y-=r;
 765                 }
 766                 close(f);
 767         }else{
 768                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 769         }
 770 }
 771 void save_screen_shot(int automap_flag)
 772 {
 773 //      fix t1;
 774         char message[100];
 775         static int savenum=0;
 776         char savename[13];
 777         unsigned char *buf;
 778
 779         if (!ogl_readpixels_ok){
 780                 if (!automap_flag)
 781                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 782                 return;
 783         }
 784
 785         stop_time();
 786
 787 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 788         if ( savenum == 9999 ) savenum = 0;
 789         sprintf(savename,"scrn%04d.tga",savenum++);
 790
 791         while(!access(savename,0))
 792         {
 793                 if ( savenum == 9999 ) savenum = 0;
 794                 sprintf(savename,"scrn%04d.tga",savenum++);
 795         }
 796         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 797 //end this section addition/change - Victor Rachels
 798
 799         if (automap_flag) {
 800 //      save_font = grd_curcanv->cv_font;
 801 //      gr_set_curfont(GAME_FONT);
 802 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 803 //      gr_get_string_size(message,&w,&h,&aw);
 804 //              modex_print_message(32, 2, message);
 805         } else {
 806                 hud_message(MSGC_GAME_FEEDBACK,message);
 807         }
 808
 809         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 810         glReadBuffer(GL_FRONT);
 811         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 812         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 813         d_free(buf);
 814
 815         key_flush();
 816         start_time();
 817 }